@article{EUG_1985_6_a1,
     author = {\ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\acute\upsilon}\ensuremath{\rho}o\ensuremath{\varsigma} \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {A\ensuremath{\rho}\ensuremath{\chi}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {\ensuremath{\Delta}\ensuremath{\iota}\ensuremath{\alpha}\ensuremath{\varphi}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\varsigma}} {\ensuremath{\Gamma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {28--43},
     year = {1985},
     volume = {6},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1985_6_a1/}
}